The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 1979
Filed:
Aug. 05, 1977
Applicant:
Inventors:
Edouard Legille, Luxembourg, LU;
Rene Mahr, Howald-Hesperange, LU;
Assignee:
S.A. des Anciens Etablissements Paul Wurth, Luxembourg, LU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C10G / ;
U.S. Cl.
CPC ...
208 / ; 201 40 ; 202262 ; 208 / ;
Abstract
A process for treating bituminous schists including the steps of crushing the bituminous schist, feeding said schist to the top of a retort, pyrolyzing the crushed schist in said retort as it is moved downwardly therein through a combustion zone into which air is introduced, removing volatiles from the upper part of the retort, and removing spent schist from the bottom of the retort, said process being characterized by maintaining the combustion zone at a predetermined level in the retort by feeding the schist in a gradual and even manner.